You can get ACC 3-28 bushings at any big archery supplier or local pro shop.But you can also use the standard taper AD nock adpater and cut it off at the first groove closet to the shaft and G-nocks will fit.I done it both ways,either use the ACC 3-28 bushing or cut off the tapered nock adapter.
Larry I have used the same method on my AD Nitro's orange label,the Nitro's are just like the Trads and Trad Lite's but they are just stiffer and lighter weight.Easton ACC are a aluminum/carbons thats comes in many different sizes and spines almost like aluminum but they are usally $130+ a dozen for shafts.